<template>
    <div>
        <home-header></home-header>
        <home-swiper :list="swiperList"></home-swiper>
        <home-icons :list="iconList"></home-icons>
        <home-recommend :list="recommend"></home-recommend>
        <home-weekend :list="weekendList"></home-weekend>
    </div>
</template>

<script>
import HomeHeader from './components/Header'
import HomeSwiper from './components/Swiper'
import HomeIcons from './components/Icons'
import HomeRecommend from './components/Recommend'
import HomeWeekend from './components/Weekend'
import axios from 'axios'
import { mapState } from 'vuex'

export default {
    name:'Home',
    components:{
        HomeHeader,
        HomeSwiper,
        HomeIcons,
        HomeRecommend,
        HomeWeekend
    },
    data() {
        return {
            lastCity:'',
            swiperList:[],
            iconList:[],
            recommend:[],
            weekendList:[]
        }
    },
    computed:{
        ...mapState(['city'])
    },
    methods:{
        getHomeInfo () {
            axios.get('/api/index.json?city=' + this.city) // 根据城市的不同，来请求ajax
                .then((res)=>{
                    res = res.data
                    if(res.ret && res.data) {
                        this.swiperList=res.data.swiperList
                        this.iconList=res.data.iconList
                        this.recommend=res.data.recommendList
                        this.weekendList=res.data.weekendList
                    }
                })
        } 
    },
    mounted () {
        this.lastCity = this.city
        this.getHomeInfo()
    },
    activated () { // 当使用keep-alive之后就会多了这个钩子函数，当页面被重新显示的时候，activated重新执行
        if (this.lastCity !== this.city) { // 如果城市发生变化，就发出ajax请求
            this.lastCity = this.city
            this.getHomeInfo()
        }
    }
}
</script>

<style scoped>

</style>
